Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 1 3 6 or 7.
A252304
Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 1 3 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 1 3 6 or 7.
Terms
- a(0) =12027a(1) =7625a(2) =8650a(3) =11639a(4) =22521a(5) =34279a(6) =48579a(7) =109845a(8) =172039a(9) =240515a(10) =630341a(11) =1001223a(12) =1372035a(13) =4084741a(14) =6541831a(15) =8798211a(16) =28880133a(17) =46506247a(18) =61723395a(19) =215907589a(20) =348800263a(21) =459211011a(22) =1666815237a(23) =2697504007a(24) =3535502595
External references
- oeis: A252304